21890523334 has 32 divisors (see below), whose sum is σ = 34722699264. Its totient is φ = 10334096640.

The previous prime is 21890523311. The next prime is 21890523337. The reversal of 21890523334 is 43332509812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21890523337) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2616502 + ... + 2624854.

It is an arithmetic number, because the mean of its divisors is an integer number (1085084352).

Almost surely, 2^21890523334 is an apocalyptic number.

21890523334 is a deficient number, since it is larger than the sum of its proper divisors (12832175930).

21890523334 is a wasteful number, since it uses less digits than its factorization.

21890523334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9412.

The product of its (nonzero) digits is 155520, while the sum is 40.

The spelling of 21890523334 in words is "twenty-one billion, eight hundred ninety million, five hundred twenty-three thousand, three hundred thirty-four".